Telegraph sounder



Dec. 16, 1924. y 1,519,840

J. A. HULlT TELEGRAPH sounnsn Filed Nov.` 23, 1921 Patented Dec. 16, 1924.

UNITED STATI-:sf

JOHN A. HULIT, OF CHICAGO, ILLINOIS.

TELEGRAPH SOUNDER.

Application led November To all whom t may concern.'

Be it known that I, JOHN A. HULIT, a citizen of the United States, and a resident of Chicago, county of Cook, State of Illinois, have invented a certain new and useful Improvement in Telegraph Sounders, of which the following is a. specification.

This invention relates to telegraph sounders having a housing open at one side to direct or throw the sound in the desired direction.

Generally stated, the object of the invention is to provide a novel and improved construction whereby the walls of the housing are deadened and not adapted to transmit the sound, so that all of the sound waves will pass outthrough the opening at one side of the housing, and whereby, at the same time, the desired effect of a resonator will be ensured, to some extent, notwithstanding the use of deadened walls for the housing.

It is also an object to provide certain details and features of improvement tending to increase the general efficiency and desirability of a sounder of this particular construction.

To these and other useful ends the invention consists in matters hereinafter set forth and claimed and shown in the accompanying drawings in which:

Figure 1 is a front elevation of a telegraph sounder embodying the principles of the invention, showing a portion of the housing in section.

Figure 2 is a vertical section on line 2 2 in Figure l.

As thus illustrated, the invention comprises a sheet metal housing 1 in the form of a rectangular box having its open side provided with a flat frame or flange 2 forming the face of the structure. A sound deadening lining 3 is secured to the inner surface of said housing. This lining may be cork or any other material which will prevent the sound vibrations from reaching the sheet metal walls of the housing. A sheet metal resonator in the form of a sounder box 4 is hung` by screws 5, or by any suitable means, in the housing, with space 6 between the walls of said box 4 and the lining 3 previously mentioned. The instrument 7 is an electric telegraph sounder or receiving instrument of' any suitable character. This instrument is supported by a plate 8 on the bottom wall of the box 4, and

23, 1921. Serial No. 517,214.

the entire structure is supported in the desired position by any suitable means.

The housing 1 with its lining prevents the sound vibrations from passing out in any direction except from the open front thereof. Thus the sounder can only be heard by an operator directly in front of the instrument. At the same time the resonator amplifies t-he sound, which would not be true if the sounder were mounted directly in the lining of the housing without. any sound amplifying means whatever. Vithout the housing and its lining, the sound vibrations pass backward through the box 4, and the sound could be heard behind as well as in front. The lining 3 and the box 4 together, with space between, cooperate to direct or throw all of the sound in the desired direction, without losing the amplifying effect which is also desirable.

The desirable thing, of course, in a sounder of this character, is to have both direct and reflected sound waves reach the ear of the operator. The structure shown and described, which illustrates one form of the invention, does this in the manner explained, and at the same time prevents the sound waves from passing backward through the lining.

It will be seen that the sheet metal box 4, being hung at its top by the screws 5, is free to vibrate without being damped by the cork lining of' the housing. Thus the sound produced by the instrument is amplilied and deflected outward from the soundproof housing, in the desired manner.

lVhat I claim as my invention is:

l. In av telegraph sounder, the combination of a sheet metal housing open at one side to direct the sound in the desired direction, a sound deadening lining for said housing, a sheet metal resonator box in said housino', spaced a distance from said lining said box being open at the same side that said housing is open, and a sounder instrument in said box.

2. In a telegraph sounder, a housing open at one side to direct the sound in the desired direction, a sound deadening lining for said housing, and a sounder instrument having resonator means supported in said housing.

3. A structure as specified in claim Q, said resonant means comprising a. box hung at its top to serve as sound amplifying means for the instrument in said housing.

4. In a telegraph sounder, a housing havamplifying means comprising a resonant support for the sounder.

6. A structure as specified in claim 4, said l0 amplifying means comprising a resonant Wall adjacent to the sounder.

JOHN A. HULIT. 

